I was sorta feeling this way with an old group of parents. I introduced a monthly newsletter and added a "reminder" section to it. This is where I address any concerns....make drop off's quick, payment is due in the morning, appropriate clothes need to be worn or sent to daycare everyday, don't do this, don't do that lol kinda thing. It helped a lot and now I rarely have to put a reminder in there. (I also pretty much have a new group though)

It would help with some but not all of your problems. I would put reminders like "every child must nap for xxx amount of time before they are allowed to get up and do quiet activities", "I am closed at xxx time. I have a family and commitments myself so I am not able to stay open longer and the late fee will be charged", "all meals are the same here, I am not a short order cook" (you could make that one nicer haha)

Good luck!! Don't wear yourself out to the breaking point!